You will see what great benefit the computers you own can be _____ every time we use them.
A． atB．ofC．forD．on
B解析:
本題考查介詞。將從句what great benefit the computers you own can be變?yōu)檎ＵZ序應(yīng)是the computers you own can be_____what great benefit。其意義是“你的電腦可能非常有用處”故用介詞of。
be of great benefit（ to）（對(duì)……）很有幫助。
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